Innovative trends in breeding disease resistant rice varieties

Abstract

Rice has become widespread in world agriculture due to its high adaptation to growing conditions and the selection of many different types of varieties. The creation of new varieties of rice in Russia has been carried out using the methods of complex multistage hybridization and marker selection with close cooperation of breeders and biotechnologists. The result of this work is a mid-season variety Utyos that combines high yields with resistance to blast, the main fungal disease of rice that affects leaves, stems and panicles of the plant. The late-ripening rice variety IR-36, which has complex resistance to fungal and bacterial diseases and viruses, was used as a donor. Variety Utyos was created by selecting an elite plant from the F2 BC4 Flagship / IR-36 population, with repeated selection and verification by offspring. Starting from the first backcrossing, marker control was carried out for the presence of transferred donor alleles in the hybrid offspring. In parallel, phytopathological control was carried out against an infectious background. In 2019, in environmental tests, Utyos formed the maximum grain yield of 11.95 t / ha with winter wheat as the predecessor. At the same time, the variety showed high resistance to blast.